Correct / acceptable baffle & endcap hole diameter.

[papersoldier]

Just have a quick question for those here experienced with building form 1 suppressors, specifically in 9mm:

Is a 3/8" (.375) baffle and endcap hole diameter adequete for 9mm projectiles (assuming the threads on the firearm are perfectly concentric to the bore), or is that cutting it too close clearance wise? If this diameter is too small, what's the recommended minimum diameter in your experience?

Thanks in advance for any feedback.

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[turbo_vanner]

I used a 3/8" drill for mine, works so far with my three lug and a booster on everything i've tried.